run-tests: open child-parent pipes in binary mode Python's pickle is a binary format. [ original upstream message ]

run-tests: add --time option to log times for each test --time also prints out the wall-clock time each test takes in descending order. [ original upstream message ]

run-tests: remove resultslock since it serves no useful purpose Each child process has its own copy of the results dict, so all access to the results dict is serial. [ original upstream message ]